If a(b)=b^2 -2b and 4a(b)=a(2b)-24, what is the value of b?
2 answers
1.5
4a(b) = a(2b)-24
4(b^2-2b) = (2b)^2-2(2b)-24
4b^2-8b = 4b^2-4b-24
4b = 24
b = 6
4(b^2-2b) = (2b)^2-2(2b)-24
4b^2-8b = 4b^2-4b-24
4b = 24
b = 6